ventriculoatriostomy
noun
ven·tric·u·lo·atri·os·to·my
-ˌā-trē-ˈäs-tə-mē
plural ventriculoatriostomies
: surgical establishment of a shunt to drain cerebrospinal fluid (as in hydrocephalus) from a ventricle of the brain to the right atrium
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Merriam-Webster unabridged
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